What are the high temperature refractories? Introduction of common high temperature refractories
Aluminum silicate: AlSiO3, made of hard clay clinker, melted by resistance or electric arc furnace and blown into fiber. Aluminum silicate fiber, also known as ceramic fiber, is a new type of lightweight refractory material, which has the advantages of light bulk density, high temperature resistance, good thermal stability, low thermal conductivity, small thermal capacity, good mechanical vibration resistance, small thermal expansion and good thermal insulation. After special processing, it can be made into aluminum silicate fiber board, aluminum silicate fiber felt, aluminum silicate fiber rope, aluminum silicate fiber blanket and other products. The new sealing material has the characteristics of high temperature resistance, low thermal conductivity, light bulk density, long service life, high tensile strength, good elasticity and no toxicity. It is a new material to replace asbestos and is widely used for thermal insulation of thermal energy equipment in metallurgy, electric power, machinery, chemical industry and other industries.
Ceramic fiber: Ceramic fiber is also called aluminum silicate fiber, so it is called ceramic fiber because one of its main components is alumina, which is the main component of porcelain. Adding zirconium oxide or chromium oxide can further improve the service temperature of ceramic fibers. Ceramic fiber products refer to industrial products made of ceramic fibers, which have the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small specific heat and mechanical impact resistance, and are specially used in various high temperature, high pressure and easy-to-wear environments. Ceramic fiber products are an excellent refractory material. It has the advantages of light weight, high temperature resistance, small heat capacity, good heat insulation performance, good heat insulation performance at high temperature and non-toxicity.
Rock wool: Rock wool originated in Hawaii. Rock wool is an inorganic material, introduced by China Skoda Rock Wool Manufacturing Co., Ltd., as one of the large domestic rock wool manufacturers, specializing in the production of Skoda series of high-end rock wool products. Rock wool is made of high-quality basalt and dolomite, which are fused at high temperature and made by high-speed centrifugal equipment. It has strong heat insulation and fire resistance.
Glass wool: Glass wool belongs to a kind of glass fiber and is an artificial inorganic fiber. Glass wool is a kind of material similar to cotton, which is made of molten glass fiber. Its chemical composition belongs to glass and it is an inorganic fiber. It has the advantages of good formability, low bulk density, low thermal conductivity, heat preservation and insulation, good sound absorption, corrosion resistance and stable chemical properties. It has a large number of tiny pores, which make it play the role of heat preservation, sound absorption and noise reduction and safety protection. It is the best material for thermal insulation, sound absorption and noise reduction of steel structure buildings.
These kinds introduced in the above small series are common high-temperature refractories, and everyone should have a good understanding. At present, high-temperature refractories are widely used, and many metallurgical furnaces and heating pipes are coated with high-temperature refractories. In addition, high-temperature refractories are also widely used in the aerospace field. Although these fields have little to do with everyone, we still need to do some detailed understanding, as a supplement to some amateur knowledge.